@book { QuantitativeAnalysenzumdeutschenundinternationalenLuftfrachtmarkt,
    title = "Quantitative Analysen zum deutschen und internationalen Luftfrachtmarkt",
    author = "Alexander {Prinz}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1105497"
}